Should I Be Concerned About Persistent Vaginal Itching After Unprotected Sex Despite Using Non-perfume Soap And Pantyliners?

Hi, few days ago I had unprotected sex with my partner, I use contraceptive, few days after I started to have itchy vagina after washing down there it becomes better but throughout the day it starts again what should I do? I use non perfume soap..pantyliners Should I be worried?will it go away eventually or needs treatment?